u(r)≡rR(r)→−2mℏ2dr2d2u+Veffectiveu=Eu Radial equation which may be used to solve for R(r), the radial wave function Veffective=V+2mℏ2r2l(l+1) The second term is called the centrifugal term, which has the effect of pushing the particle away from the origin